Dumping grate



Dec. 8,1925

F. A. COLEMAN DUMPING GRATE Filed June 11. 1923 JYVIA/I'OE M Q. ale/144w j 33 w:

GT2 QENEgS Patented Dec. 8, 1925.

UNITED STATES A PATENT v o m FREDERICK A. COLEMAN, OF CLEVELAND, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO CARL W. SCHAEFER, OF CLEVELAND, OHIO.

DUMPING GRATE.

Application filed June 11, 1923. Serial No. 644,728.

To aZZ whom it may concern:

Be it known that I, FREDERICK A. COLE- MAN, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in a Dumping Grate, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to furnace grates, and has to do particularly with the dumping effect of a movable portion of a substantially flat grate furnace, and is particularly useful in connection with furnace grates of the type, such for example, as are usedfor heating core ovens and the like.

The particular objects of the invention include the arrangement at the front portion of such a grate of a movable section, adapted normally to stand in a raised position preferably sloping upwardly and forwardly, and to be there held by a lever and link .mechanism, automatically retaining it in its upper position, while facilitating ready lowering to its downward position by a movement consisting of the swinging downwardly of the handle. In a lowered position, the dumping portion of the grate stands preferably sloping downwardly and forwardly,

leaving an opening through which a poker or scraper or a like instrument, may be thrust to stir the fire or to remove the ashes therefrom.

A further object is to so arrange the operating mechanism that piling of ashes in front of this dumping portion, shall not interfere with the raising and lowering mechanism thereof. A further object is the provision of an easily removable grate tilting device. Other objects of the invention will become apparent in the further description which refers to the accompanying drawing and its essential characteristics will be summarized in the claims.

In the drawing, Fig. 1 is in the nature of a longitudinal section of a furnace showing my device in its supporting position; Fig. 2

is a fragmentary section similar to the above, showing my device in its lowered position;

Fig. 3 is a fragmentary sectional plan of the dumping grate mechanism taken along the lines 33 of Fig. 2.

I have shown a furnace having an upper inlet opening 1 closed by the usual door, a

' lower fire opening 2, and substantially horimaybe swung upwardly to bridge the'gap The movable grate 5 is made between the bed grate and the front wall of the furnace. up of short sections 5 each provided at their ends with hook portions for engaging suitable cross rods 6 and 7 The sections 9 and 10 at the sides of the grate are adapted to hook over the rearward rod 6 which is shown as supported by brackets 8 embedded in the side walls of the furnace, while at their forward ends, these sections form bearings 9 and 10 embracing the rod 7 The locking and supporting means for the movable section of the grate comprises movable rigid frame brackets pivotally carried by open bearing blocks 23 secured to the furnace floor while intermediate links 15 connect the framework with the movable grate section. The side frame membersare preferably castings in the form of triangles 20, each having an extended vside as at 21 for carrying the hand'operating bar 22. This bar connects the ends of the extensions 21' and serves also as a bracing member for the frames. The links 15 connecting the frame to the grate section are pivoted at the meeting of the legs 24 and 25 of the triangle and carry stop projections 16 which act upon engaging the frame member 24 when the frame is swung upwardly as shown in Fig; 1.

To operate the device, the handle 22 is pulled forwardly and lowered to the furnace floor as shown in Fig. 2, in which position a poker, fire hook, or other instrument may be inserted as indicated in broken lines at 31. It will be noticed that the'frame and link members are disposed at either side of the opening and will not be in the way of the operator when stirring the fire or pulling ashes from the furnace, nor are any of the frame members likely to be buried under the ashes so as to necessitate the removal there. of before repositioning the device.

To reposition the grate, the 7 frame is swung upwardly about the pivots 18, bring- I ing the link 15 and leg 25 into a straight line. A further swinging causes the link and leg to knuckle inwardly. Since further movement than that shown in Fig. l is arrested by the projections 16 engaging the frame memberQt, the weight of the grate, links, etc., tending to further swing these members rearwardly locks the grate section in its raised position. To prevent inadvertent displacement, a. latch spring may be secured to the furnace door frame in any convenient. manner.

In a furnace such as shown, it would be possible to dispense with the lugs 16 in which event the extensions 21 on the frame should rest against the lower portion of the door frame, thus locking the grate in raised position. When it is desirable to clean the furnace, the whole" structure may be removed while in its lowered position by first removing the individual grate sections 5 from the bars 6 and 7, then unhooking the end sections 9 and 10 from the bar 6 and finally raising the entire remaining structure out of the slotted supporting brackets 23.

I claim I 1. The combination of a fire grate, a dumping section at the forward end of the fire grate and having its rear end pivotally supported adjacent the forward end of the fire grate, a pair of links pivotally connected to the forward end of the dumping section adjacent its ends, a pair of frame members at opposite sides of the ash space pivotally supported at their lower ends and pivotally connected to the lower ends of the links, said frame'members having arms extending forwardly to the front of thefurnace, and a cross-bar connecting said forwardly extending arms. I

2. In a furnace, frame members disposed at either side of the ash opening, pivotal supports therefor, a pair of links carried by the frame members, a grate movable supported at one end by the links and at the other pivotally supported on a stationary axis and means comprising projections carried by the links engaging the frame members when swung past the critical line of support whereby the grate is held in raised position.

In testimony whereof, I hereunto affix my signature.

FREDERICK A. COLEMAN. 

